Change timestamp: Add filename

[B.Douille]

I would like to suggest to add the filename on display in the Change Timestamp dialog window.

When multiple objects are selected and the user browse using the Next / Previous buttons it's sometime difficult to identify which one is shown. In series of images, a number of these can be very similar. There could be video-clips as well so there is nothing shown.

Having the file name on display can help, especialy when the user's goal is to synchronise images from multiple sources.
As file names can be relatively long I suggest to place them on the top of the dialog window.

Thanks in advance

[B.Douille]

I see this has been added in 1.97

Thanks Pierre